Journal article
Photothermal effects control ultrafast charge transport in titanium carbide MXenes
Nature communications, v 17(1), 1201
29 Jan 2026
PMID: 41611693
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Titanium carbide MXene (Ti₃C₂Tₓ) is an emerging metallic material with promise for (opto)electronics and thermal management. Yet how photoexcitation-particularly via photogenerated thermal energy-modifies its charge carrier dynamics remains poorly understood. By combining time-resolved terahertz spectroscopy and transient reflectance measurements, we reveal a long-lived, photo-induced suppression of conductivity, which we attribute to efficient lattice heating and slow heat dissipation in Ti₃C₂T
. A systematic variation of pump photon energy reveals that this 'negative' photoconductivity can equivalently be induced by lattice temperature increases, indicating a thermal origin. Repetition-rate-dependent transient reflectance measurements further show residual heat persisting over 100 ns, substantially longer than in conventional metals. Our work presents a unified understanding of photothermal effects in Ti₃C₂Tₓ and their influence on non-equilibrium charge transport, underscoring its potential for photothermal electronics and light-to-thermal energy storage applications.
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Details
- Title
- Photothermal effects control ultrafast charge transport in titanium carbide MXenes
- Creators
- Wenhao Zheng - Max Planck Institute for Polymer ResearchHugh Ramsden - Eindhoven University of TechnologyStefano Ippolito - Drexel UniversityMax van Hemert - Eindhoven University of TechnologyDanzhen Zhang - Drexel UniversityTeng Zhang - Drexel UniversityDongqi Li - Technische Universität DresdenGuanzhao Wen - Max Planck Institute for Polymer ResearchJaco J Geuchies - Leiden UniversityMinghao Yu - Max Planck Institute of Microstructure PhysicsXinliang Feng - Max Planck Institute of Microstructure PhysicsYury Gogotsi - Drexel UniversityKlaas-Jan Tielrooij - Institut Català de Nanociència i NanotecnologiaHai I Wang (Corresponding Author) - Max Planck Institute for Polymer Research
- Publication Details
- Nature communications, v 17(1), 1201
- Publisher
- Nature Publishing Group
- Number of pages
- 8
- Grant note
- Projekt DEAL
Open Access funding enabled and organized by Projekt DEAL.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; A.J. Drexel Nanomaterials Institute
- Web of Science ID
- WOS:001675115500002
- Scopus ID
- 2-s2.0-105028966931
- Other Identifier
- 991022157470204721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary